Xiaomi Roidmi 2s Smart Drive Edition Car Bluetooth Music Player FM Transmitter – Review

Roidmi 2s Smart Drive Edition

Roidmi is another company under Xiaomi ecosystem which produce the very premium looking USB car chargers for Xiaomi. 

Roidmi had previously released the “Classic Edition” of the Bluetooth FM transmitter, please read our review here.

Roidmi had just released a new version of their popular Car Bluetooth FM transmitter that seamlessly stream music to any car! Listen to your favorite music, charge your device faster than ever.

The new version now supports hands free calls and Voice Recognition, as well as an IOS apps.

Simple Setup, Easy Streaming

Just insert Roidmi 2s smart car charger into the cigarette lighter, connect to your bluetooth device via Roidmi app, let the app automatically scan for highest-quality FM radio stations for you, and start streaming your favorite music in your car. Roidmi 2s and Roidmi App are compatible with all mainstream music apps. With intelligent noise reduction, free radio connection, and high-definition playback, you turn your car into an entertainment center.

Fast Charging  Multiple Devices, Twice as Fast

Roidmi 2s also provides you with the ultimate convenience of charging multiple devices in your car. Roidmi’s dual USB ports support accelerated charging with 2.4A for a single output, and 3.8A for a dual output. The suitable input voltage is 12/24V DC, creating 2X charging speed as normal car chargers. The 95% conversion rate of electrical energy also saves time and energy.

System Compatibility  

Roidmi 2s and Roidmi App are compatible with both Android and iOS systems, a better new if compared with the earlier “Classic Edition”, which only support Apps on Android, but not IOS.

Hands-Free Calling  No More Missing Calls (new features)

Roidmi’s built-in microphone makes for clearer, more effective hands-free communication and ensures a safer driving experience. Roidmi’s microphone possesses a unique background noise reduction function to increase clarity. When there’s an incoming call, just shake the phone to answer, and music streaming will be paused automatically.  

By simply shaking your phone, you can suspend music playing and receive phone calls.

Navigation Broadcast  Hear the Map on Your Phone

Roidmi 2s is also your navigation companion that broadcasts map navigation on your phone. Navigation broadcasting is another plus from Roidmi 2S. Don’t limit yourself from the speaker from your smartphone and missed out the route. Enjoy louder and clearer navigation guidance through car’s stereo. When the navigation broadcast is on, music volume is automatically reduced. Safely navigate to your destination, hands-free.

LED System – The USB ports are illuminated by LED lights that can be adjusted in the app

Battery Voltage Monitor Function 

Roidmi 2s constantly monitors your vehicle’s battery voltage. When the battery is low, both Roidmi charger and app will alert you with red warning lights and warning sound, making for a safer driving experience.

FM Radio Scanning  

Roidmi 2s allows you to stream music safely while driving, with intelligent noise reduction, free FM radio connection, and high-definition playback. It scans for the highest-quality FM radio stations, combining with intelligent background noise-reduction function, greatly enhancing sound quality.

Roidmi Apps – Setting up

You can easily found the Roidmi app in Google Playstore or IOS’s Appstore. The following are some screenshots of setting up.

Note : Some screens, features and functionalities may varied between IOS and Android versions.

Boot-up screen

Sign-in using Mi account then set-up

Connecting via Bluetooth

Choose your main music player

Set-up the corresponding frequency on your FM radio and you are done!

Hands Free Functions

Next up, we have the hands-free feature, You are able to use this smart charger to stream your call to your car’s audio too! And you will be able to converse with the built-in microphone on the USB charger.  They had also packed in a simple ‘shake phone’ gesture for you to take up an incoming call for conveniency and safer driving or the ‘shake phone’ gesture can also be use to switch your song to the Next song in your playlist.

Navigation Broadcast

Others than that, Roidmi 2S can also stream the navigation to your car’s audio further enhancing your driving experience. And it will automatically reduce the music volume when navigating broadcast is going on.

with this setting only music and navigation will be stream to my car’s audio

Battery voltage monitor function.  

Roidmi 2S will also helps to monitor your car’s battery condition. When the battery voltage is low, it will alert you with a alert tone via your car’s audio and also with the red LED lights.  For this, you just need to select whether you are driving a Small car or a Big car when setting-up the charger and there is a table in-app also which will tells you the battery health status.

LED Fundtions

The Roidmi 2S also comes with LED indicators which will dimly shine through the dual ports.  You can also choose what colors you want in-app.

Car Models compatibility

One major cons that we had observe is that, the total contact conductive electrode design of Roidmi 2S. It have some compatibility issue with some of the cars model and some buyers may find out their car is not under the supported models.

For cars that have the straight-through type cigarette hole which makes the Roidmi 2S unable to fit snuggly in the hole. So when the car vibrate or go through some bump it will get disconnected. But there is one simple workaround for this, you may just insert a small piece of paper to the side of the USB charger and it will fit nicely without affecting the connection.  

They specially design a adapter for the incompatible cars too which you need to purchase separately or you may just use a piece of paper to see if it works for you.

Xiaomi Roidmi: A FM modulator and ‘Smart’ & ‘Secure’ Car Charger


Xiaomi ROIDMI is a car charger but with the addition of Bluetooth and FM transmision function.

Xiaomi Roidmi as a Secure Charger

Although there is a variety and quality of car charger, nowadays. But if we go back to those years when most of the car chargers were of low cost, quite rudimentary and had very low amperage. Thus, they would experience the eternal burden and sometimes were unworkable. The most dangerous aspect of them was that the changing amperes in the car which could even produce a short circuit in the phone or the charger.

The Xiaomi Roidmi offers an amperage of 3.1 A. The amperage is divided into two ports, one with 2.1A and other with 1A. The first port can be used to charge a phone and other can provide support to a dash cam or any other low ampere device like a USB fan. In addition to this, the two ports are also illuminated with a blue LED.

Xiaomi has included several security measures in its charging. These measures includes an anti-short circuit system, protection against rises in temperature. It also has a system to detect the type of device and ensuring the best performance for that device.

Xiaomi Roidmi as a Bluetooth FM Transmitter

Apart from the main function of the device: charging gadgets, Roidmi also have some additional features.

The Roidmihas two wireless connections, a Bluetooth 4.0 connection and a FM transmitter. It enables it’s users to play music from their phones on the car’s FM tuner. This is something that may not be necessary because many new cars nowadays have an auxiliary connection or a Bluetooth system. But for those who are deprived from this technology in their cars, which we believe majority of the cars out there, for them Xiaomi Roidmi will be really useful.

Using it on an iPhone

You can connect Roidmi to your phone using the Mi Smart Home app, you can scan the QR code below and install the App on your iPhone.

If you have an iPhone you must connect to Bluetooth Roidmi with the default frequency of 96.4MHz, which is pre-set when shipped out from the factory.

However, if the default 96.4Mhz crashes with an existing FM station frequency in your area, it will cause interference between the ROidmi and the FM stations’ broadcast. What you can do is to borrow an Android phone and install the Roidmi app (see QR code below), and manually search for a frequency on your car’s FM that ‘s not currently occupied by any FM station, then use the Android Roidmi app to set the broadcasting frequency to the unoccupied range.

Thereafter, your music streamed from your iPhone will sync with the Roidmi through bluetooth, and Roidmi will broadcast the music with the newly set FM frequency.

Using it on An Android Phone

As far as the radio is concerned, android smartphone is more likely to be used. Because you can use the intuitive Roidmi Driver Android app (see QR code above) to set the frequency at which it will issue the Xiaomi Roidmi thus avoid interference with other radio stations.

Supported Car models

Note: Before buying Xiaomi Roidmi, we must inform you that unfortunately it is not compatible with all cars. The seller offers the following list of unsupported cars:

PEUGEOT 301 / PEUGEOT 2008, DS 3 SKODA Fabia / Rapid Spaceback, TOYOTA Vois, Changan Mazda 2, Dongfeng Honda XR-V, Renault Captur, Honda Odyssey / City / Vezel / Crider / Shuttle, CITROEN Elysee.  No NISSAN, SUBARU or KIA for all models.

Installation steps

The following are translated from the original Chinese Manual coming with the Roidmi.

Main Specs

Installing unit

1. Remove the cover of the cigarette lighter (if any) in the car, and make sure there is no waste inside of the cigarette lighter.

2. Insert Roidmi to the cigarette lighter. When flashing, pair the Roidmi device via Bluetooth. When there is a steady light, pairing is successful and the device is connected via Bleutooth.

Setting Up using Roidmi App recommendations (for Android Apps only)

1. To install the player and Bluetooth connection, please read the installation guide in the Roidmi App;

2. The default frequency is 96.4MHz

3. After a successful pairing Roidmi with a smartphone, you can set the FM radio frequency via phone, or use an automatic search of FM frequency for broadcasting music files stored on your phone

4. We recommend an FM frequency in accordance with the recommendations of the App to maintain the highest sound quality;

5. If your smartphone does not find Roidmi, make sure that Bluetooth is enabled on your phone, and cigarette lighter has a power supply; if the device do not pair for a long time, try to connect to the new device via Smartphone or restart Roidmi.